It is our intellectual technologies that have the greatest and most lasting power over what and how we think. They are our most intimate tools, the ones we use for self-expression, for shaping personal and public identity and for cultivating relations with others…Every intellectual technology, to put it another way, embodies an intellectual ethic, a set of assumptions about how the human mind works or should work.
Nicholas Carr
Nicholas refers to Nietzsche and the typewriter, but I immediately thought about iPad.